jasonsomenroy jasonsomenroy 13-06-2018 Chemistry contestada 5 What is the concentration of a 25.0 mL HCl solution containing a phenolphthalein indicator that is titrated with 0.1 M NaOH if it requires 34.2 mL before the solution turns pink? 0.0578 M 1.37 M 0.137 M 0.274 M